EGOL,
I think humorous video would be a good idea for spreading the brand and I would expect it to work on a subconscious level (as with most marketing the psychology behind it is important) - if people need a pest control company and a decent viral video campaign has made an impression on them then they should remember the brand. When remembering the brand rather than the term this should hopefully influence their search i.e for the specific company rather than the generic term - do you agree with my thought on this?